It is possible to change the optical properties of graphene oxide colloids by modifying their oxygen bond. We report here the use of laser irradiation and electrostatic field to change the properties of graphene oxide colloids. UV-Visible and Fourier transform infrared spectroscopes clearly demonstrate that graphene oxide is successfully modified by laser irradiation and electrostatic field. It is shown that significant enhancement in optical properties of graphene oxide colloids can be achieved by modification with the electric field and laser irradiation. Compared to the effect of the laser irradiation on the graphene oxide colloids, the result of treatment by DC electric field shows a better reduction performance and larger optical responses. In addition, it is observed that treatment of the graphene oxide colloids by electrostatic field in the presence of the 532-nm laser irradiation leads to scale down the reduction level of the sample. Results show that by using different reduction processes, we can modify the physical properties of graphene oxide for achieving tunable optical responses.